the three beauties (of visual poetry)

The three general esthetic features possible for any visual poem: beauty to
the eye, to the ear, and to the intellect. (It is uncommon for a visual poem to
demonstrate the three competences and prove the poet a master of three
modes, but it is almost unheard of for a visual poem (that mute beast of half-
literature) to exhibit the three beauties of visual poetry. Yet we cannot believe
that such visual poems are impossible.)